Modern iterations of MAS include several specialized methods for different software versions:
The is a widely known open-source tool developed to troubleshoot and activate Windows and Office products. The version often searched as 1.3 is a legacy iteration of what is now a more advanced and frequently updated project maintained on platforms like GitHub and massgrave.dev . Microsoft Activation Script 1.3 Win10 Office Ac...
Is Massgrave / MAS actually safe to use for Windows activation? Modern iterations of MAS include several specialized methods
While current versions have surpassed 1.3 (with recent releases reaching v3.11 as of May 2026), the core principles of the script remain focused on providing a command-line interface for system verification and license application. Key Features of Microsoft Activation Scripts and Extended Security Updates (ESU).
Used for permanent activation of Windows, Office, and Extended Security Updates (ESU).